Samsung Galaxy S II :: Not Detecting Network?

Jul 21, 2012

My wife just came back from overseas and now her phone will not detect our wireless network, just says it's "out of range", yet my phone connects fine. I have checked all the settings which are ok, reset the phone and the router to no avail.

I bought my iPhone 4 from Singapore, currently using it in India for the past 15 months on the Airtel network.For the past 6 hours my phone is not detecting the network. It says NO DEVICE and when I checked under SETTING --> GENERAL --> ABOUT --> NETWORK it says SIM NOT ALLOWED. What seems to be the problem, is the SIM corrupt ??? Or is there a problem with the hardware itself ?

I have purchased a new Zperia Z3 from sony store in US jersey, and I opened it in India.I have tried several SIM cards but the phone is not detecting any network.Its a unlocked device and totally free from any contract.Indian service centres say they can not repair ot as its not purchased from India. Do I need to return the phone or its a minor problem. All other things in the phone are working perfectly.

I bought my ip4s (brand new) on the 19th of January. And it was working fine up until last week when it stopped detecting wifi networks When I turn on wifi the "finding networks" circle keeps on searching with no success even though I used to connect to same router before. I tried everything: resetting network connections, rebooting phone. I even downloaded the latest iOS software just now. The problem seems to persist and to add to that the battery is being drained quickly even though I already turned off wifi (so it ain't still trying to connect).

I've recently bought a HTC Incredible S from my service provider and was very anxious to test it out. However, after the 8 hours of charging, I turned on my new phone expecting to connect to my home network and start setting up my phone. Problem is, I can't seem to detect my home network. My laptop, my brother's laptop, my ipod touch, my family member's phones are all able to detect and surf with my home wireless network without any problems so why is it the Incredible S can't even detect the network? I am able to detect wireless networks from the units all around me, unfortunately they're all locked so i'm unable to test if connecting was possible but I'm unable to detect my own.

i just installed Jelly bean before 5 mins,after i rebooted my phone i put my PIN code and phone start well, but then i see this "sim network unlock pin"how can i fix it? i was using Icream sandwich before.do i need to install again ICS to fix it?

IMEI can be seen,everything is fine, when plugged in my orange sim card it just said "mobile network not available". The signal strength is fine and can be seen. I tried an O2 sim card, a talktalk (vodafone) sim card and they both worked fine. both of my 2 orange sim cards didn't work on this phone, but they worked fine on my other 2 phones. latest update, just flashed orange stock rom KJ4, got the same problem.tried manually connect to orange, got notice that "unable to connect, try later".

some more detail:every time when I flashed a new rom, always a notice saying "can't access to "/system/csc/ORA/system/". Tried *#272*imei#, there was no optional CSC available.

I have tried reinstalling the frimware and all that did was lose my apps. Tried doing a different firmware and tried rooting all the same results. The phone is definitely unlocked and unblocked as while I was searching google I came across one of those secret codes to show the status of the locks and all 4 of the categories were unlocked. I have tried a batterry pull and tried cleaning the Sim card. Also just in case this helps when I g into Settings>Call>Additional Settings it says 'Network Or Sim card error'. However the Sim card is perfectly fine.

The network mode on my Samsung galaxy S5 device is always set at GSM only. When I try to change it to WCDMA only or GSM/WCDMA (auto mode) it changes back to GSM only. The area I am has 3G network and most devices I see have H but mine always shows as E no matter what I do. When browsing it takes a long time for pages to open because its always at E.

I just rooted and unlocked a SG2 that was on the 3 network. I ran Galaxy S2 SIM Unlock after rooting using ODIN etc - I put in the unlock code and it said unlock successful. After putting in my Orange SIM and switching on, I am getting the network error symbol and am unable to make calls. (Interestingly, I do get the Orange SIM Plus app icon on the phones desktop. Also, the phone still boots with the 3 logo - was expecting this to have disappeared completely!).

I have signal and I can make calls/send texts but the o2 icon on my main home page has disappeared, it's really irritating me lol!

My mate was mucking about with my phone earlier and changed the wallpaper to a pic from facebook so I'm thinking it maybe has something to do with that... I've been through the settings and can't find anything... been in the widgets to try and get it back cause I remember on my old samsung you could put it on the screen as a widget... but no luck!

I've turned it on and off but no luck, and I don't want to have to resort to restoring it to the factory settings cause I don't want to lose everything..

I mainly use my Galaxy S II to access my WLAN and rarely use the phone for telephone calls. Yet my pre-paid credit is constantly being eaten up?

I think the phone is set up to automatically select the best network. Normally this will be my WLAN,but I suppose,if I am in an area of the house with poor WLAN coverage,the mobile network is automatically selected?

I get a poor signal indoors at home - on Orange and it's always been the case. I spoke to their customer services and was told to switch the phone from auto select for Network Mode to GSM only. My choices are GSM only, WCDMA only or Auto.

True, having done so, the signal strength seems better though not amazing but, ordinarily, I get then just a "G" for data. I found that switching to WCDMA only, data goes to 3G or even H and sometime H+ but I nearly always lose the standard signal.

I dont understand the difference between GSM and WCDMA nor whether the results I see when choosing each are to be expected or not. I'd welcome any information from those of you who know more about these things than I do.

I installed the lite'ning rom around 4 days ago but since yesterday I'm unable to activate data network mode? It's ticked under the settings and i've tried turning it on and off but it still doesn't come on. When I hold the power button it will say its activated but if I wait 30 seconds it switches to saying its deactivated? Is this a problem with the rom?

Am I right in thinking that the Data Network Mode access your data plan usage? Ie 500mb?When I activate this, it doesn't seem to allow me to connect to the net?Also is there a widget that allows me toggle this off and on?Doesn't it seem weird that Samsung hasn't give us a indicator like the wifi that this data network mode is ON? I could leave it on running without even knowing? Is there a good app which lets me see how much data I am using?

I can't make incoming/outgoing calls or send receive SMS on my phone (I get the 'Not Registered on Network' message). Interestingly there is about a 5 second window right after I turn on/off Airplane mode I can send/receive SMS and make a phonecall - the phonecall will last as long as I want, but when I hang up I'm back to square one!I have no data connectivity I can connect to WiFi etc.I have full reception i.e. full bars My phone is not blacklisted (I checked IMEI with network operator)Other SIM card won't work on my phone My SIM card works on another phone When I go into settings to select mobile network I am 'Unable to connect. Try later'i have reset the APN settings

Ever since getting my sg2, I have always had a problem with the 3g. My phone when it connects proceeds only to upload, showing only the green arrow pointing up. This happens randomly, and it happens across all the different platforms of network connection the sg2 has. The issue is incredibly annoying as my phone can't download data, meaning I cant access the internet. The issue when it happens does seem to correct itself after sometime and with me fiddling around with it, but I am yet to find a permanent solution to fix the problem. My friend recommended I turn of data and turn it back on, which does work but is very hit and miss, and the issue can still very much be present when I turn data back on. The only solution which seems to work 100% of the time is turning the phone off and on again, however this is pointlessly annoying and quite a nuisance.

I got a Samsung Galaxy S II last week for the first time, and I noticed something odd. I can connect to my home secured Wi-Fi network just fine using the network credentials, but I can't seem to use free Wi-Fi networks like McDonalds for example when I am out and about...

The phone says that I have connected, but complains that I have no network connection at those times.

My Samsung GS2 runnig on 2.3.4 has developed a problem. It keeps loosing Wifi connection at home. It connects then disconnects. It is becoming frustrating and annoying. I have uninstalled all apps and still no solution. I know others on here have had similar problems has a solution been found. I have switched the Wifi sleep to never. I have installed wifi fix which resolves it temporarily but then the connection falls off.

I have had my SG2 (On three with "all you can eat data") for about two weeks and the last week I keep getting a tethering block, several times a day, when using internet or network error while using apps. this can only be fixed by rebooting the phone. I have not used the phone for tethering or as a wifi hot spot so don't know why its doing it. I have replaced the sim card and done a factory reset on the phone but it is still doing it. When I get the error in the internet app there's a link to the three website which does work.

Ever since the last firmware update my Galaxy S2 keeps deciding to tell me that I am connected to my wifi network at home. It's extremely annoying because I could be in the middle of a game and this message appears. How I can stop it from being displayed??

i have bought this unlocked phone for about 550$, but internet is stuck on edge(not even 2g) which is incredibly slow.Please help me solve this i have searched internet but just a few ppl has the same problem with unlocked samsung galaxy S2 and tmobile.That made me think that there might be a solution like changing the Tmobile sim card(i dont know if there is only one type of sim card), entering an unlock code provided by tmobile, or going to a samsung maintenance service and let them fix it or anyother? I have updated to the new firmware but did no effect.I cant understand how such a big company like samsungs' cutting edge new phone comes out of the factory with unsupporting the USAs one(Tmobile) of the 2(Tmobile,ATT) GSM networks data frequency.

- I've got the Network Mode on Auto (as it always was when the phone actually worked), and also I haven't been playing around with the APNs or anything like that.

- I bought the phone legit from Carphone warehouse a few months ago, and it worked mostly fine up until I switched it back on yesterday. I'd had a few problems with non-wifi internet before I left last month, but nothing affecting making calls etc.

Managed to get GS2 to connect to my home network wirelessly Also managed to connect GS2 to my laptop via USB, eventually But, cannot connect to laptop wirelessly - laptop just doesn't see it on the network?when connected to my home wireless network, does the phone just use that for internet access or do I have to turn something off to avoid using my monthly allowance?

For the first two days it was working properly but after a software update of 133.33 mb for touchwiz it suddenly stopped detecting my sim card, i used the same sim card in an another phone, the sim was ok. when i tried another other sim card in the galaxy s5 it was not detecting it. Also i tried to register the mobile network but a message was displaying "insert sim card to access network". I don't know what to do now as the phone was bought from japan but m using it in India.